| material | code | chemical composition（%） | surface hardness（hsd） | |||||||||||
| c | si | mn | cr | ni | mo | p | s | v | cu | mg | barrel | neck | ||
| pearlitic nodular cast iron rolls ⅰ | spⅰ | 2.90-3.60 | 1.40-2.20 | 0.40-1.00 | 0.20-0.60 | 1.50-2.00 | 0.20-0.80 | ≤0.15 | ≤0.03 | ≥0.04 | 45-55 | 35-55 | ||
| pearlitic nodular cast iron rollsⅱ | spⅱ | 2.90-3.60 | 1.20-2.00 | 0.40-1.00 | 0.30-1.00 | 2.01-2.50 | 0.20-0.80 | ≤0.15 | ≤0.03 | ≥0.04 | 55-65 | 35-55 | ||
| pearlitic nodular cast iron rolls ⅲ | spⅲ | 2.90-3.60 | 1.00-2.00 | 0.40-1.00 | 0.20-1.20 | 2.51-3.00 | 0.20-0.80 | ≤0.15 | ≤0.03 | ≥0.04 | 62-72 | 35-55 | ||